CVE-2026-53400i2c: core: fix adapter registration race
- 7.8HighCVSS base score
- 0.14%Exploitation in 30 daysEPSS · top 97% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: i2c: core: fix adapter registration race Adapters can be looked up based on their id using i2c_get_adapter() which takes a reference to the embedded struct device. Make sure that the adapter (including its struct device) has been initialised before adding it to the IDR to avoid accessing uninitialised data which could, for example, lead to NULL-pointer dereferences or use-after-free. Note that the i2c-dev chardev, which is registered from a bus notifier, currently uses i2c_get_adapter() so the adapter needs to be added to the IDR before registration.
Timeline
ID reserved
By Linux
- 40 days later
· 40 days later
Published
- 4 months later
· 4 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.14% · top 97% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 6e13e641841833cc2aa5baefe89bb04bc388801b – < 2e57c788e71f1763445f812eba4e0b4a2fbd0646
- affected 6e13e641841833cc2aa5baefe89bb04bc388801b – < a4365bc41baaf67f3a5aa8556d23544e6ec7480a
- affected 6e13e641841833cc2aa5baefe89bb04bc388801b – < 1febb174815bcae56d73587e99e8f87e02f0784d
- affected 6e13e641841833cc2aa5baefe89bb04bc388801b – < da9d8d9711f78deebc202d0cffcf577e45ee8621
- affected 6e13e641841833cc2aa5baefe89bb04bc388801b – < 78793c75dc6d0ff2e4d50ad617349b328a99054e
- affected 6e13e641841833cc2aa5baefe89bb04bc388801b – < 6a946038f2a5a8c29048c6af369d4e391448a5c5
- affected 6e13e641841833cc2aa5baefe89bb04bc388801b – < a4c8094bbf4c6fa68b17e3b16f6a0a1b7a14f3e0
- affected 6e13e641841833cc2aa5baefe89bb04bc388801b – < ba14d7cf2fe7284610a29854bdff22b2537d3ce6
- affected 2.6.22
- unaffected < 2.6.22
- unaffected 5.10.261 – ≤ 5.10.*
- unaffected 5.15.212 – ≤ 5.15.*
- unaffected 6.1.178 – ≤ 6.1.*
- unaffected 6.6.145 – ≤ 6.6.*
- unaffected 6.12.95 – ≤ 6.12.*
- unaffected 6.18.38 – ≤ 6.18.*
- unaffected 7.1.3 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References10
- https://git.kernel.org/stable/c/2e57c788e71f1763445f812eba4e0b4a2fbd0646 (opens in a new tab)
- https://git.kernel.org/stable/c/a4365bc41baaf67f3a5aa8556d23544e6ec7480a (opens in a new tab)
- https://git.kernel.org/stable/c/1febb174815bcae56d73587e99e8f87e02f0784d (opens in a new tab)
- https://git.kernel.org/stable/c/da9d8d9711f78deebc202d0cffcf577e45ee8621 (opens in a new tab)
- https://git.kernel.org/stable/c/78793c75dc6d0ff2e4d50ad617349b328a99054e (opens in a new tab)
- https://git.kernel.org/stable/c/6a946038f2a5a8c29048c6af369d4e391448a5c5 (opens in a new tab)
- https://git.kernel.org/stable/c/a4c8094bbf4c6fa68b17e3b16f6a0a1b7a14f3e0 (opens in a new tab)
- https://git.kernel.org/stable/c/ba14d7cf2fe7284610a29854bdff22b2537d3ce6 (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-45455 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-53400)Record last updated .